Amplifier circuit with offset compensation
US6674322B2 · kind B2 · utility
44Cited by
6References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 6, 2003 |
| Grant date | Jan 6, 2004 |
| Priority date | — |
| Expiry date | Feb 1, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/261
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier circuit with offset compensation is particularly suited for a Hall element. In addition to the useful signal demodulation that is normally present and connected downstream of an amplifier, an error signal demodulator provides an error signal demodulation. The measured signals that are tapped off at the Hall sensor are coupled out at the input or output of the amplifier, and a demodulated error signal is fed back to the input of the amplifier. This makes it possible to reduce the drive range of the amplifier. The amplifier circuit is suitable in particular for Hall sensors that are operated in chopped mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.